MAX4468EKA+T datasheet(8/12 Pages) MAXIM

Part #	MAX4468EKA+T

Description	Low-Cost, Micropower, SC70/SOT23-8, Microphone Preamplifiers with Complete Shutdown

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Manufacturer	MAXIM [Maxim Integrated Products]

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common mode. The ratio of these voltages is called the

common-mode gain. The common-mode rejection ratio

is the ratio of differential-mode gain to common-mode

gain.

The

high

CMRR

properties

of

the

MAX4465–MAX4469 provide outstanding performances

when configured as a noninverting microphone pream-

plifier.

Power-Up

The MAX4465–MAX4469 outputs typically settle within

1µs after power-up. Figure 6 shows the output voltage

on power-up.

Power Supplies and Layout

The MAX4465–MAX4469 operate from a single +2.4V to

+5.5V power supply. Bypass the power supply with a

0.1µF capacitor to ground. Good layout techniques are

necessary for the MAX4465–MAX4469 family. To

decrease stray capacitance, minimize trace lengths by

placing external components close to the op amp’s

pins. Surface-mount components are recommended. In

systems where analog and digital grounds are avail-

able, the MAX4465–MAX4469 should be connected to

the analog ground.

Test Circuits/Timing Diagrams

Figure 2. MAX4466 Typical Application Circuit

ELECTRET

CAPSULE

VCC = +5V

MAX4466

2k

Ω

10k

Ω

GND

100k

Ω

100pF

1M

Ω

+5V

1M

Ω

2k

Ω

0.1

µF

0.01

µF

1

µF

1

5

2

4

3

IN+

IN-

OUT

Low-Cost, Micropower, SC70/SOT23-8, Microphone

Preamplifiers with Complete Shutdown

8

1V/div

100

µs/div

Figure 1. Rail-to-Rail Output Operation

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MAX4468EKA+T Datasheet(PDF) 8 Page - Maxim Integrated Products

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